xref: /frameworks/base/services/core/java/com/android/server/wm/ActivityMetricsLogger.java

package com.android.server.wm;

import static android.app.ActivityManager.PROCESS_STATE_NONEXISTENT;
import static android.app.ActivityManager.START_SUCCESS;
import static android.app.ActivityManager.START_TASK_TO_FRONT;
import static android.app.ActivityManager.processStateAmToProto;
import static android.app.CameraCompatTaskInfo.CAMERA_COMPAT_CONTROL_DISMISSED;
import static android.app.CameraCompatTaskInfo.CAMERA_COMPAT_CONTROL_HIDDEN;
import static android.app.CameraCompatTaskInfo.CAMERA_COMPAT_CONTROL_TREATMENT_APPLIED;
import static android.app.CameraCompatTaskInfo.CAMERA_COMPAT_CONTROL_TREATMENT_SUGGESTED;
import static android.app.WaitResult.INVALID_DELAY;
import static android.app.WaitResult.LAUNCH_STATE_COLD;
import static android.app.WaitResult.LAUNCH_STATE_HOT;
import static android.app.WaitResult.LAUNCH_STATE_RELAUNCH;
import static android.app.WaitResult.LAUNCH_STATE_WARM;
import static android.app.WindowConfiguration.WINDOWING_MODE_FREEFORM;
import static android.app.WindowConfiguration.WINDOWING_MODE_FULLSCREEN;
import static android.app.WindowConfiguration.WINDOWING_MODE_MULTI_WINDOW;
import static android.app.WindowConfiguration.WINDOWING_MODE_UNDEFINED;

import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.ACTION_ACTIVITY_START;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_BIND_APPLICATION_DELAY_MS;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_CALLING_PACKAGE_NAME;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_CANCELLED;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_DELAY_MS;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_DEVICE_UPTIME_SECONDS;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_IS_EPHEMERAL;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_PROCESS_RUNNING;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_REPORTED_DRAWN;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_REPORTED_DRAWN_MS;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_STARTING_WINDOW_DELAY_MS;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.APP_TRANSITION_WINDOWS_DRAWN_DELAY_MS;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_CALLING_PACKAGE_NAME;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_CALLING_UID;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_CALLING_UID_HAS_ANY_VISIBLE_WINDOW;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_CALLING_UID_PROC_STATE;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_CLASS_NAME;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_COMING_FROM_PENDING_INTENT;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_INSTANT_APP_LAUNCH_TOKEN;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_INTENT_ACTION;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_CUR_PROC_STATE;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_HAS_CLIENT_ACTIVITIES;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_HAS_FOREGROUND_ACTIVITIES;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_HAS_FOREGROUND_SERVICES;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_HAS_OVERLAY_UI;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_HAS_TOP_UI;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_MILLIS_SINCE_FG_INTERACTION;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_MILLIS_SINCE_LAST_INTERACTION_EVENT;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_MILLIS_SINCE_UNIMPORTANT;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_PENDING_UI_CLEAN;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_PROCESS_RECORD_PROCESS_NAME;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_REAL_CALLING_UID;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_REAL_CALLING_UID_HAS_ANY_VISIBLE_WINDOW;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_REAL_CALLING_UID_PROC_STATE;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.FIELD_TARGET_SHORT_COMPONENT_NAME;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.PACKAGE_OPTIMIZATION_COMPILATION_FILTER;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.PACKAGE_OPTIMIZATION_COMPILATION_REASON;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.TYPE_TRANSITION_COLD_LAUNCH;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.TYPE_TRANSITION_HOT_LAUNCH;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.TYPE_TRANSITION_REPORTED_DRAWN_NO_BUNDLE;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.TYPE_TRANSITION_REPORTED_DRAWN_WITH_BUNDLE;
import static com.android.internal.logging.nano.MetricsProto.MetricsEvent.TYPE_TRANSITION_WARM_LAUNCH;
import static com.android.internal.util.FrameworkStatsLog.APP_COMPAT_STATE_CHANGED__LETTERBOX_POSITION__NOT_LETTERBOXED_POSITION;
import static com.android.internal.util.FrameworkStatsLog.APP_COMPAT_STATE_CHANGED__STATE__LETTERBOXED_FOR_ASPECT_RATIO;
import static com.android.internal.util.FrameworkStatsLog.APP_COMPAT_STATE_CHANGED__STATE__LETTERBOXED_FOR_FIXED_ORIENTATION;
import static com.android.internal.util.FrameworkStatsLog.APP_COMPAT_STATE_CHANGED__STATE__LETTERBOXED_FOR_SIZE_COMPAT_MODE;
import static com.android.internal.util.FrameworkStatsLog.APP_COMPAT_STATE_CHANGED__STATE__NOT_LETTERBOXED;
import static com.android.internal.util.FrameworkStatsLog.APP_COMPAT_STATE_CHANGED__STATE__NOT_VISIBLE;
import static com.android.internal.util.FrameworkStatsLog.APP_START_OCCURRED__PACKAGE_STOPPED_STATE__PACKAGE_STATE_NORMAL;
import static com.android.internal.util.FrameworkStatsLog.APP_START_OCCURRED__PACKAGE_STOPPED_STATE__PACKAGE_STATE_STOPPED;
import static com.android.internal.util.FrameworkStatsLog.CAMERA_COMPAT_CONTROL_EVENT_REPORTED__EVENT__APPEARED_APPLY_TREATMENT;
import static com.android.internal.util.FrameworkStatsLog.CAMERA_COMPAT_CONTROL_EVENT_REPORTED__EVENT__APPEARED_REVERT_TREATMENT;
import static com.android.internal.util.FrameworkStatsLog.CAMERA_COMPAT_CONTROL_EVENT_REPORTED__EVENT__CLICKED_APPLY_TREATMENT;
import static com.android.internal.util.FrameworkStatsLog.CAMERA_COMPAT_CONTROL_EVENT_REPORTED__EVENT__CLICKED_DISMISS;
import static com.android.internal.util.FrameworkStatsLog.CAMERA_COMPAT_CONTROL_EVENT_REPORTED__EVENT__CLICKED_REVERT_TREATMENT;
import static com.android.server.am.MemoryStatUtil.MemoryStat;
import static com.android.server.am.MemoryStatUtil.readMemoryStatFromFilesystem;
import static com.android.server.am.ProcessList.INVALID_ADJ;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.DEBUG_METRICS;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.TAG_ATM;
import static com.android.server.wm.ActivityTaskManagerDebugConfig.TAG_WITH_CLASS_NAME;
import static com.android.server.wm.ActivityTaskManagerInternal.APP_TRANSITION_RECENTS_ANIM;
import static com.android.server.wm.ActivityTaskManagerInternal.APP_TRANSITION_TIMEOUT;
import static com.android.server.wm.EventLogTags.WM_ACTIVITY_LAUNCH_TIME;

import android.annotation.NonNull;
import android.annotation.Nullable;
import android.app.ActivityOptions;
import android.app.ActivityOptions.SourceInfo;
import android.app.ApplicationStartInfo;
import android.app.CameraCompatTaskInfo.CameraCompatControlState;
import android.app.WaitResult;
import android.app.WindowConfiguration.WindowingMode;
import android.content.ComponentName;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.IncrementalStatesInfo;
import android.content.pm.dex.ArtManagerInternal;
import android.content.pm.dex.PackageOptimizationInfo;
import android.metrics.LogMaker;
import android.os.Handler;
import android.os.Looper;
import android.os.SystemClock;
import android.os.Trace;
import android.os.incremental.IncrementalManager;
import android.util.ArrayMap;
import android.util.EventLog;
import android.util.Log;
import android.util.Slog;
import android.util.SparseArray;
import android.util.TimeUtils;

import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.logging.MetricsLogger;
import com.android.internal.util.FrameworkStatsLog;
import com.android.internal.util.LatencyTracker;
import com.android.internal.util.function.pooled.PooledLambda;
import com.android.server.FgThread;
import com.android.server.LocalServices;
import com.android.server.apphibernation.AppHibernationManagerInternal;
import com.android.server.apphibernation.AppHibernationService;

import java.util.ArrayList;
import java.util.concurrent.TimeUnit;

/**
 * Listens to activity launches, transitions, visibility changes and window drawn callbacks to
 * determine app launch times and draw delays. Source of truth for activity metrics and provides
 * data for Tron, logcat, event logs and {@link android.app.WaitResult}.
 * <p>
 * A typical sequence of a launch event could be:
 * {@link #notifyActivityLaunching}, {@link #notifyActivityLaunched},
 * {@link #notifyStartingWindowDrawn} (optional), {@link #notifyTransitionStarting}
 * {@link #notifyWindowsDrawn}.
 * <p>
 * Tests:
 * atest CtsWindowManagerDeviceTestCases:ActivityMetricsLoggerTests
 */
class ActivityMetricsLogger {

    private static final String TAG = TAG_WITH_CLASS_NAME ? "ActivityMetricsLogger" : TAG_ATM;

    // Window modes we are interested in logging. If we ever introduce a new type, we need to add
    // a value here and increase the {@link #TRON_WINDOW_STATE_VARZ_STRINGS} array.
    private static final int WINDOW_STATE_STANDARD = 0;
    private static final int WINDOW_STATE_SIDE_BY_SIDE = 1;
    private static final int WINDOW_STATE_FREEFORM = 2;
    private static final int WINDOW_STATE_ASSISTANT = 3;
    private static final int WINDOW_STATE_MULTI_WINDOW = 4;
    private static final int WINDOW_STATE_INVALID = -1;

    // These should match AppStartOccurred.MultiWindowLaunchType in the atoms.proto
    private static final int MULTI_WINDOW_LAUNCH_TYPE_UNSPECIFIED = 0;
    private static final int MULTI_WINDOW_LAUNCH_TYPE_APP_PAIR = 1;

    /**
     * If a launching activity isn't visible within this duration when the device is sleeping, e.g.
     * keyguard is locked, its transition info will be dropped.
     */
    private static final long UNKNOWN_VISIBILITY_CHECK_DELAY_MS = 3000;

    /**
     * If the recents animation is finished before the delay since the window drawn, do not log the
     * action because the duration is too small that may be just an accidentally touch.
     */
    private static final long LATENCY_TRACKER_RECENTS_DELAY_MS = 300;

    /**
     * The flag for {@link #notifyActivityLaunching} to skip associating a new launch with an active
     * transition, in the case the launch is standalone (e.g. from recents).
     */
    private static final int IGNORE_CALLER = -1;

    // Preallocated strings we are sending to tron, so we don't have to allocate a new one every
    // time we log.
    private static final String[] TRON_WINDOW_STATE_VARZ_STRINGS = {
            "window_time_0", "window_time_1", "window_time_2", "window_time_3", "window_time_4"};

    private int mWindowState = WINDOW_STATE_STANDARD;
    private long mLastLogTimeSecs;
    private final ActivityTaskSupervisor mSupervisor;
    private final MetricsLogger mMetricsLogger = new MetricsLogger();
    private final Handler mLoggerHandler = FgThread.getHandler();

    /** All active transitions. */
    private final ArrayList<TransitionInfo> mTransitionInfoList = new ArrayList<>();
    /** Map : Last launched activity => {@link TransitionInfo} */
    private final ArrayMap<ActivityRecord, TransitionInfo> mLastTransitionInfo = new ArrayMap<>();
    /** SparseArray : Package UID => {@link PackageCompatStateInfo} */
    private final SparseArray<PackageCompatStateInfo> mPackageUidToCompatStateInfo =
            new SparseArray<>(0);

    private ArtManagerInternal mArtManagerInternal;
    private final StringBuilder mStringBuilder = new StringBuilder();

    /**
     * Due to the global single concurrent launch sequence, all calls to this observer must be made
     * in-order on the same thread to fulfill the "happens-before" guarantee in LaunchObserver.
     */
    private final LaunchObserverRegistryImpl mLaunchObserver;
    private final ArrayMap<String, Boolean> mLastHibernationStates = new ArrayMap<>();
    private AppHibernationManagerInternal mAppHibernationManagerInternal;

    /**
     * The information created when an intent is incoming but we do not yet know whether it will be
     * launched successfully.
     */
    static final class LaunchingState {
        /**
         * The device uptime of {@link #notifyActivityLaunching}. It can be used as a key for
         * observer to identify which callbacks belong to a launch event.
         */
        final long mStartUptimeNs = SystemClock.uptimeNanos();
        /**
         * The timestamp of {@link #notifyActivityLaunching}. It is used to provide the time
         * relative to the wall-time.
         */
        final long mStartRealtimeNs = SystemClock.elapsedRealtimeNanos();
        /** Non-null when a {@link TransitionInfo} is created for this state. */
        private TransitionInfo mAssociatedTransitionInfo;
        /** The sequence id for trace. It is used to map the traces before resolving intent. */
        private static int sTraceSeqId;
        /** The trace format is "launchingActivity#$seqId:$state(:$packageName)". */
        String mTraceName;

        LaunchingState() {
            if (!Trace.isTagEnabled(Trace.TRACE_TAG_ACTIVITY_MANAGER)) {
                return;
            }
            // Use an id because the launching app is not yet known before resolving intent.
            sTraceSeqId++;
            mTraceName = "launchingActivity#" + sTraceSeqId;
            Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, mTraceName, 0);
        }

        void stopTrace(boolean abort, TransitionInfo endInfo) {
            if (mTraceName == null) return;
            if (!abort && endInfo != mAssociatedTransitionInfo) {
                // Multiple TransitionInfo can be associated with the same LaunchingState (e.g. a
                // launching activity launches another activity in a different windowing mode or
                // display). Only the original associated info can emit a "completed" trace.
                return;
            }
            Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, mTraceName, 0);
            final String launchResult;
            if (mAssociatedTransitionInfo == null) {
                launchResult = ":failed";
            } else {
                final String status;
                if (abort) {
                    status = ":canceled:";
                } else if (!mAssociatedTransitionInfo.mProcessSwitch) {
                    status = ":completed-same-process:";
                } else {
                    if (endInfo.mTransitionType == TYPE_TRANSITION_HOT_LAUNCH) {
                        status = ":completed-hot:";
                    } else if (endInfo.mTransitionType == TYPE_TRANSITION_WARM_LAUNCH) {
                        status = ":completed-warm:";
                    } else {
                        status = ":completed-cold:";
                    }
                }
                launchResult = status + mAssociatedTransitionInfo.mLastLaunchedActivity.packageName;
            }
            // Put a supplement trace as the description of the async trace with the same id.
            Trace.instant(Trace.TRACE_TAG_ACTIVITY_MANAGER, mTraceName + launchResult);
            mTraceName = null;
        }

        @VisibleForTesting
        boolean allDrawn() {
            return mAssociatedTransitionInfo != null && mAssociatedTransitionInfo.mIsDrawn;
        }

        boolean hasActiveTransitionInfo() {
            return mAssociatedTransitionInfo != null;
        }

        boolean contains(ActivityRecord r) {
            return mAssociatedTransitionInfo != null && mAssociatedTransitionInfo.contains(r);
        }
    }

    /** The information created when an activity is confirmed to be launched. */
    private static final class TransitionInfo {
        /**
         * The field to lookup and update an existing transition efficiently between
         * {@link #notifyActivityLaunching} and {@link #notifyActivityLaunched}.
         *
         * @see LaunchingState#mAssociatedTransitionInfo
         */
        final LaunchingState mLaunchingState;

        /** The type can be cold (new process), warm (new activity), or hot (bring to front). */
        int mTransitionType;
        /** Whether the process was already running when the transition started. */
        boolean mProcessRunning;
        /** whether the process of the launching activity didn't have any active activity. */
        final boolean mProcessSwitch;
        /** The process state of the launching activity prior to the launch */
        final int mProcessState;
        /** The oom adj score of the launching activity prior to the launch */
        final int mProcessOomAdj;
        /** Whether the activity is launched above a visible activity in the same task. */
        final boolean mIsInTaskActivityStart;
        /** Whether the last launched activity has reported drawn. */
        boolean mIsDrawn;
        /** The latest activity to have been launched. */
        @NonNull ActivityRecord mLastLaunchedActivity;

        /** The type of the source that triggers the launch event. */
        @SourceInfo.SourceType int mSourceType;
        /** The time from the source event (e.g. touch) to {@link #notifyActivityLaunching}. */
        int mSourceEventDelayMs = INVALID_DELAY;
        /** The time from {@link #notifyActivityLaunching} to {@link #notifyTransitionStarting}. */
        int mCurrentTransitionDelayMs;
        /** The time from {@link #notifyActivityLaunching} to {@link #notifyStartingWindowDrawn}. */
        int mStartingWindowDelayMs = INVALID_DELAY;
        /** The time from {@link #notifyActivityLaunching} to {@link #notifyBindApplication}. */
        int mBindApplicationDelayMs = INVALID_DELAY;
        /** Elapsed time from when we launch an activity to when its windows are drawn. */
        int mWindowsDrawnDelayMs;
        /** The reason why the transition started (see ActivityManagerInternal.APP_TRANSITION_*). */
        int mReason = APP_TRANSITION_TIMEOUT;
        /** The flag ensures that {@link #mStartingWindowDelayMs} is only set once. */
        boolean mLoggedStartingWindowDrawn;
        /** If the any app transitions have been logged as starting. */
        boolean mLoggedTransitionStarting;
        /** Whether any activity belonging to this transition has relaunched. */
        boolean mRelaunched;

        /** Non-null if the application has reported drawn but its window hasn't. */
        @Nullable Runnable mPendingFullyDrawn;
        /** Non-null if the trace is active. */
        @Nullable String mLaunchTraceName;
        /** Whether this transition info is for an activity that is a part of multi-window. */
        int mMultiWindowLaunchType = MULTI_WINDOW_LAUNCH_TYPE_UNSPECIFIED;

        /** @return Non-null if there will be a window drawn event for the launch. */
        @Nullable
        static TransitionInfo create(@NonNull ActivityRecord r,
                @NonNull LaunchingState launchingState, @Nullable ActivityOptions options,
                boolean processRunning, boolean processSwitch, int processState, int processOomAdj,
                boolean newActivityCreated, boolean isInTaskActivityStart, int startResult) {
            if (startResult != START_SUCCESS && startResult != START_TASK_TO_FRONT) {
                return null;
            }
            final int transitionType;
            if (processRunning) {
                transitionType = !newActivityCreated && r.attachedToProcess()
                        ? TYPE_TRANSITION_HOT_LAUNCH
                        : TYPE_TRANSITION_WARM_LAUNCH;
            } else {
                // Task may still exist when cold launching an activity and the start result will be
                // set to START_TASK_TO_FRONT. Treat this as a COLD launch.
                transitionType = TYPE_TRANSITION_COLD_LAUNCH;
            }
            return new TransitionInfo(r, launchingState, options, transitionType, processRunning,
                    processSwitch, processState, processOomAdj, isInTaskActivityStart);
        }

        /** Use {@link TransitionInfo#create} instead to ensure the transition type is valid. */
        private TransitionInfo(ActivityRecord r, LaunchingState launchingState,
                ActivityOptions options, int transitionType, boolean processRunning,
                boolean processSwitch, int processState, int processOomAdj,
                boolean isInTaskActivityStart) {
            mLaunchingState = launchingState;
            mTransitionType = transitionType;
            mProcessRunning = processRunning;
            mProcessSwitch = processSwitch;
            mProcessState = processState;
            mProcessOomAdj = processOomAdj;
            mIsInTaskActivityStart = isInTaskActivityStart;
            setLatestLaunchedActivity(r);
            // The launching state can be reused by consecutive launch. Its original association
            // shouldn't be changed by a separated transition.
            if (launchingState.mAssociatedTransitionInfo == null) {
                launchingState.mAssociatedTransitionInfo = this;
            }
            if (options != null) {
                final SourceInfo sourceInfo = options.getSourceInfo();
                if (sourceInfo != null) {
                    mSourceType = sourceInfo.type;
                    mSourceEventDelayMs = (int) (TimeUnit.NANOSECONDS.toMillis(
                            launchingState.mStartUptimeNs) - sourceInfo.eventTimeMs);
                }
            }
        }

        /**
         * Remembers the latest launched activity to represent the final transition. This also
         * tracks the activities that should be drawn, so a consecutive launching sequence can be
         * coalesced as one event.
         */
        void setLatestLaunchedActivity(ActivityRecord r) {
            if (mLastLaunchedActivity == r) {
                return;
            }
            if (mLastLaunchedActivity != null) {
                // Transfer the launch cookie and launch root task because it is a consecutive
                // launch event.
                r.mLaunchCookie = mLastLaunchedActivity.mLaunchCookie;
                mLastLaunchedActivity.mLaunchCookie = null;
                r.mLaunchRootTask = mLastLaunchedActivity.mLaunchRootTask;
                mLastLaunchedActivity.mLaunchRootTask = null;
            }
            mLastLaunchedActivity = r;
            mIsDrawn = r.isReportedDrawn();
        }

        /** Returns {@code true} if the incoming activity can belong to this transition. */
        boolean canCoalesce(ActivityRecord r) {
            if (mLastLaunchedActivity.mDisplayContent != r.mDisplayContent
                    || mLastLaunchedActivity.getWindowingMode() != r.getWindowingMode()) {
                return false;
            }
            // The current task should be non-null because it is just launched. While the
            // last task can be cleared when starting activity with FLAG_ACTIVITY_CLEAR_TASK.
            final Task lastTask = mLastLaunchedActivity.getTask();
            final Task currentTask = r.getTask();
            if (lastTask != null && currentTask != null) {
                if (lastTask == currentTask) {
                    return true;
                }
                return lastTask.getBounds().equals(currentTask.getBounds());
            }
            return mLastLaunchedActivity.isUid(r.launchedFromUid);
        }

        /** @return {@code true} if the activity matches a launched activity in this transition. */
        boolean contains(ActivityRecord r) {
            return r == mLastLaunchedActivity;
        }

        /**
         * @return {@code true} if the transition info should be sent to MetricsLogger, StatsLog, or
         *         LaunchObserver.
         */
        boolean isInterestingToLoggerAndObserver() {
            return mProcessSwitch;
        }

        int calculateCurrentDelay() {
            return calculateDelay(SystemClock.uptimeNanos());
        }

        int calculateDelay(long timestampNs) {
            // Shouldn't take more than 25 days to launch an app, so int is fine here.
            return (int) TimeUnit.NANOSECONDS.toMillis(
                    timestampNs - mLaunchingState.mStartUptimeNs);
        }

        @Override
        public String toString() {
            return "TransitionInfo{" + Integer.toHexString(System.identityHashCode(this))
                    + " a=" + mLastLaunchedActivity + " d=" + mIsDrawn + "}";
        }
    }

    static final class TransitionInfoSnapshot {
        final private ApplicationInfo applicationInfo;
        final private WindowProcessController processRecord;
        final String packageName;
        final String launchedActivityName;
        final private String launchedActivityLaunchedFromPackage;
        final private String launchedActivityLaunchToken;
        final private String launchedActivityAppRecordRequiredAbi;
        final String launchedActivityShortComponentName;
        final private String processName;
        @VisibleForTesting final @SourceInfo.SourceType int sourceType;
        @VisibleForTesting final int sourceEventDelayMs;
        final private int reason;
        final private int startingWindowDelayMs;
        final private int bindApplicationDelayMs;
        final int windowsDrawnDelayMs;
        final int type;
        final int userId;
        /**
         * Elapsed time from when we launch an activity to when the app reported it was
         * fully drawn. If this is not reported then the value is set to INVALID_DELAY.
         */
        final int windowsFullyDrawnDelayMs;
        final int activityRecordIdHashCode;
        final boolean relaunched;
        final long timestampNs;
        final int multiWindowLaunchType;

        private TransitionInfoSnapshot(TransitionInfo info) {
            this(info, info.mLastLaunchedActivity, INVALID_DELAY);
        }

        private TransitionInfoSnapshot(TransitionInfo info, ActivityRecord launchedActivity,
                int windowsFullyDrawnDelayMs) {
            applicationInfo = launchedActivity.info.applicationInfo;
            packageName = launchedActivity.packageName;
            launchedActivityName = launchedActivity.info.name;
            launchedActivityLaunchedFromPackage = launchedActivity.launchedFromPackage;
            launchedActivityLaunchToken = launchedActivity.info.launchToken;
            launchedActivityAppRecordRequiredAbi = launchedActivity.app == null
                    ? null
                    : launchedActivity.app.getRequiredAbi();
            reason = info.mReason;
            sourceEventDelayMs = info.mSourceEventDelayMs;
            startingWindowDelayMs = info.mStartingWindowDelayMs;
            bindApplicationDelayMs = info.mBindApplicationDelayMs;
            windowsDrawnDelayMs = info.mWindowsDrawnDelayMs;
            type = info.mTransitionType;
            processRecord = launchedActivity.app;
            processName = launchedActivity.processName;
            sourceType = info.mSourceType;
            userId = launchedActivity.mUserId;
            launchedActivityShortComponentName = launchedActivity.shortComponentName;
            activityRecordIdHashCode = System.identityHashCode(launchedActivity);
            this.windowsFullyDrawnDelayMs = windowsFullyDrawnDelayMs;
            relaunched = info.mRelaunched;
            timestampNs = info.mLaunchingState.mStartRealtimeNs;
            multiWindowLaunchType = info.mMultiWindowLaunchType;
        }

        @WaitResult.LaunchState int getLaunchState() {
            switch (type) {
                case TYPE_TRANSITION_WARM_LAUNCH:
                    return LAUNCH_STATE_WARM;
                case TYPE_TRANSITION_HOT_LAUNCH:
                    return relaunched ? LAUNCH_STATE_RELAUNCH : LAUNCH_STATE_HOT;
                case TYPE_TRANSITION_COLD_LAUNCH:
                    return LAUNCH_STATE_COLD;
                default:
                    return -1;
            }
        }

        boolean isInterestedToEventLog() {
            return type == TYPE_TRANSITION_WARM_LAUNCH || type == TYPE_TRANSITION_COLD_LAUNCH;
        }

        PackageOptimizationInfo getPackageOptimizationInfo(ArtManagerInternal artManagerInternal) {
            return artManagerInternal == null || launchedActivityAppRecordRequiredAbi == null
                    ? PackageOptimizationInfo.createWithNoInfo()
                    : artManagerInternal.getPackageOptimizationInfo(applicationInfo,
                            launchedActivityAppRecordRequiredAbi, launchedActivityName);
        }
    }

    /** Information about the App Compat state logging associated with a package UID . */
    private static final class PackageCompatStateInfo {
        /** All activities that have a visible state. */
        final ArrayList<ActivityRecord> mVisibleActivities = new ArrayList<>();
        /** The last logged state. */
        int mLastLoggedState = APP_COMPAT_STATE_CHANGED__STATE__NOT_VISIBLE;
        @Nullable ActivityRecord mLastLoggedActivity;
    }

    ActivityMetricsLogger(ActivityTaskSupervisor supervisor, Looper looper) {
        mLastLogTimeSecs = SystemClock.elapsedRealtime() / 1000;
        mSupervisor = supervisor;
        mLaunchObserver = new LaunchObserverRegistryImpl(looper);
    }

    private void logWindowState(String state, int durationSecs) {
        mMetricsLogger.count(state, durationSecs);
    }

    void logWindowState() {
        final long now = SystemClock.elapsedRealtime() / 1000;
        if (mWindowState != WINDOW_STATE_INVALID) {
            // We log even if the window state hasn't changed, because the user might remain in
            // home/fullscreen move forever and we would like to track this kind of behavior
            // too.
            mLoggerHandler.sendMessage(PooledLambda.obtainMessage(
                    ActivityMetricsLogger::logWindowState, this,
                    TRON_WINDOW_STATE_VARZ_STRINGS[mWindowState], (int) (now - mLastLogTimeSecs)));
        }
        mLastLogTimeSecs = now;

        mWindowState = WINDOW_STATE_INVALID;
        final Task focusedTask = mSupervisor.mRootWindowContainer.getTopDisplayFocusedRootTask();
        if (focusedTask == null)  return;
        if (focusedTask.isActivityTypeAssistant()) {
            mWindowState = WINDOW_STATE_ASSISTANT;
            return;
        }

        @WindowingMode final int windowingMode = focusedTask.getWindowingMode();
        switch (windowingMode) {
            case WINDOWING_MODE_FULLSCREEN:
                mWindowState = WINDOW_STATE_STANDARD;
                break;
            case WINDOWING_MODE_FREEFORM:
                mWindowState = WINDOW_STATE_FREEFORM;
                break;
            case WINDOWING_MODE_MULTI_WINDOW:
                mWindowState = WINDOW_STATE_MULTI_WINDOW;
                break;
            default:
                if (windowingMode != WINDOWING_MODE_UNDEFINED) {
                    Slog.wtf(TAG, "Unknown windowing mode for task=" + focusedTask
                            + " windowingMode=" + windowingMode);
                }
        }
    }

    /** @return Non-null {@link TransitionInfo} if the activity is found in an active transition. */
    @Nullable
    private TransitionInfo getActiveTransitionInfo(ActivityRecord r) {
        for (int i = mTransitionInfoList.size() - 1; i >= 0; i--) {
            final TransitionInfo info = mTransitionInfoList.get(i);
            if (info.contains(r)) {
                return info;
            }
        }
        return null;
    }

    /**
     * This method should be only used by starting recents and starting from recents, or internal
     * tests. Because it doesn't lookup caller and always creates a new launching state.
     *
     * @see #notifyActivityLaunching(Intent, ActivityRecord, int)
     */
    LaunchingState notifyActivityLaunching(Intent intent) {
        return notifyActivityLaunching(intent, null /* caller */, IGNORE_CALLER);
    }

    /**
     * Notifies the tracker at the earliest possible point when we are starting to launch an
     * activity. The caller must ensure that {@link #notifyActivityLaunched} will be called later
     * with the returned {@link LaunchingState}. If the caller is found in an active transition,
     * it will be considered as consecutive launch and coalesced into the active transition.
     */
    LaunchingState notifyActivityLaunching(Intent intent, @Nullable ActivityRecord caller,
            int callingUid) {
        TransitionInfo existingInfo = null;
        if (callingUid != IGNORE_CALLER) {
            // Associate the launching event to an active transition if the caller is found in its
            // launched activities.
            for (int i = mTransitionInfoList.size() - 1; i >= 0; i--) {
                final TransitionInfo info = mTransitionInfoList.get(i);
                if (caller != null && info.contains(caller)) {
                    existingInfo = info;
                    break;
                }
                if (existingInfo == null && callingUid == info.mLastLaunchedActivity.getUid()) {
                    // Fallback to check the most recent matched uid for the case that the caller is
                    // not an activity.
                    existingInfo = info;
                }
            }
        }
        if (DEBUG_METRICS) {
            Slog.i(TAG, "notifyActivityLaunching intent=" + intent
                    + " existingInfo=" + existingInfo);
        }

        if (existingInfo == null) {
            final LaunchingState launchingState = new LaunchingState();
            // Only notify the observer for a new launching event.
            launchObserverNotifyIntentStarted(intent, launchingState.mStartUptimeNs);
            return launchingState;
        }
        return existingInfo.mLaunchingState;
    }

    /**
     * Notifies the tracker that the activity is actually launching.
     *
     * @param launchingState The launching state to track the new or active transition.
     * @param resultCode One of the {@link android.app.ActivityManager}.START_* flags, indicating
     *                   the result of the launch.
     * @param launchedActivity The activity that is being launched
     * @param newActivityCreated Whether a new activity instance is created.
     * @param options The given options of the launching activity.
     */
    void notifyActivityLaunched(@NonNull LaunchingState launchingState, int resultCode,
            boolean newActivityCreated, @Nullable ActivityRecord launchedActivity,
            @Nullable ActivityOptions options) {
        if (launchedActivity == null || launchedActivity.getTask() == null) {
            // The launch is aborted, e.g. intent not resolved, class not found.
            abort(launchingState, "nothing launched");
            return;
        }

        final WindowProcessController processRecord = launchedActivity.app != null
                ? launchedActivity.app
                : mSupervisor.mService.getProcessController(
                        launchedActivity.processName, launchedActivity.info.applicationInfo.uid);
        // Whether the process that will contains the activity is already running.
        final boolean processRunning = processRecord != null;
        // We consider this a "process switch" if the process of the activity that gets launched
        // didn't have an activity that was in started state. In this case, we assume that lot
        // of caches might be purged so the time until it produces the first frame is very
        // interesting.
        final boolean processSwitch = !processRunning
                || !processRecord.hasStartedActivity(launchedActivity);
        final int processState;
        final int processOomAdj;
        if (processRunning) {
            processState = processRecord.getCurrentProcState();
            processOomAdj = processRecord.getCurrentAdj();
        } else {
            processState = PROCESS_STATE_NONEXISTENT;
            processOomAdj = INVALID_ADJ;
        }

        final TransitionInfo info = launchingState.mAssociatedTransitionInfo;
        if (DEBUG_METRICS) {
            Slog.i(TAG, "notifyActivityLaunched" + " resultCode=" + resultCode
                    + " launchedActivity=" + launchedActivity + " processRunning=" + processRunning
                    + " processSwitch=" + processSwitch
                    + " processState=" + processState
                    + " processOomAdj=" + processOomAdj
                    + " newActivityCreated=" + newActivityCreated + " info=" + info);
        }

        if (launchedActivity.isReportedDrawn() && launchedActivity.isVisible()) {
            // Launched activity is already visible. We cannot measure windows drawn delay.
            abort(launchingState, "launched activity already visible");
            return;
        }

        // If the launched activity is started from an existing active transition, it will be put
        // into the transition info.
        if (info != null && info.canCoalesce(launchedActivity)) {
            if (DEBUG_METRICS) Slog.i(TAG, "notifyActivityLaunched consecutive launch");

            final boolean crossPackage =
                    !info.mLastLaunchedActivity.packageName.equals(launchedActivity.packageName);
            // The trace name uses package name so different packages should be separated.
            if (crossPackage) {
                stopLaunchTrace(info);
            }

            mLastTransitionInfo.remove(info.mLastLaunchedActivity);
            // Coalesce multiple (trampoline) activities from a single sequence together.
            info.setLatestLaunchedActivity(launchedActivity);
            // Update the latest one so it can be found when reporting fully-drawn.
            mLastTransitionInfo.put(launchedActivity, info);

            if (crossPackage) {
                startLaunchTrace(info);
            }
            scheduleCheckActivityToBeDrawnIfSleeping(launchedActivity);
            return;
        }

        final boolean isInTaskActivityStart = launchedActivity.getTask().isVisible();
        final TransitionInfo newInfo = TransitionInfo.create(launchedActivity, launchingState,
                options, processRunning, processSwitch, processState, processOomAdj,
                newActivityCreated, isInTaskActivityStart, resultCode);
        if (newInfo == null) {
            abort(launchingState, "unrecognized launch");
            return;
        }

        // Look at all other transition infos and mark them as a split pair if they belong to
        // adjacent tasks
        updateSplitPairLaunches(newInfo);

        if (DEBUG_METRICS) Slog.i(TAG, "notifyActivityLaunched successful");
        // A new launch sequence has begun. Start tracking it.
        mTransitionInfoList.add(newInfo);
        mLastTransitionInfo.put(launchedActivity, newInfo);
        startLaunchTrace(newInfo);
        if (newInfo.isInterestingToLoggerAndObserver()) {
            launchObserverNotifyActivityLaunched(newInfo);
        } else {
            // As abort for no process switch.
            launchObserverNotifyIntentFailed(newInfo.mLaunchingState.mStartUptimeNs);
        }
        scheduleCheckActivityToBeDrawnIfSleeping(launchedActivity);

        // If the previous transitions are no longer visible, abort them to avoid counting the
        // launch time when resuming from back stack. E.g. launch 2 independent tasks in a short
        // time, the transition info of the first task should not keep active until it becomes
        // visible such as after the top task is finished.
        for (int i = mTransitionInfoList.size() - 2; i >= 0; i--) {
            final TransitionInfo prevInfo = mTransitionInfoList.get(i);
            if (prevInfo.mIsDrawn || !prevInfo.mLastLaunchedActivity.isVisibleRequested()) {
                scheduleCheckActivityToBeDrawn(prevInfo.mLastLaunchedActivity, 0 /* delay */);
            }
        }
    }

    /**
     * Updates all transition infos including the given {@param info} if they are a part of a
     * split pair launch.
     */
    private void updateSplitPairLaunches(@NonNull TransitionInfo info) {
        final Task launchedActivityTask = info.mLastLaunchedActivity.getTask();
        final Task adjacentToLaunchedTask = launchedActivityTask.getAdjacentTask();
        if (adjacentToLaunchedTask == null) {
            // Not a part of a split pair
            return;
        }
        for (int i = mTransitionInfoList.size() - 1; i >= 0; i--) {
            final TransitionInfo otherInfo = mTransitionInfoList.get(i);
            if (otherInfo == info) {
                continue;
            }
            final Task otherTask = otherInfo.mLastLaunchedActivity.getTask();
            // The adjacent task is the split root in which activities are started
            if (otherTask.isDescendantOf(adjacentToLaunchedTask)) {
                if (DEBUG_METRICS) {
                    Slog.i(TAG, "Found adjacent tasks t1=" + launchedActivityTask.mTaskId
                            + " t2=" + otherTask.mTaskId);
                }
                // These tasks are adjacent, so mark them as such
                info.mMultiWindowLaunchType = MULTI_WINDOW_LAUNCH_TYPE_APP_PAIR;
                otherInfo.mMultiWindowLaunchType = MULTI_WINDOW_LAUNCH_TYPE_APP_PAIR;
            }
        }
    }

    private void scheduleCheckActivityToBeDrawnIfSleeping(@NonNull ActivityRecord r) {
        if (r.mDisplayContent.isSleeping()) {
            // It is unknown whether the activity can be drawn or not, e.g. it depends on the
            // keyguard states and the attributes or flags set by the activity. If the activity
            // keeps invisible in the grace period, the tracker will be cancelled so it won't get
            // a very long launch time that takes unlocking as the end of launch.
            scheduleCheckActivityToBeDrawn(r, UNKNOWN_VISIBILITY_CHECK_DELAY_MS);
        }
    }

    /**
     * Notifies the tracker that all windows of the app have been drawn.
     *
     * @return Non-null info if the activity was pending to draw, otherwise it might have been set
     *         to invisible (removed from active transition) or it was already drawn.
     */
    @Nullable
    TransitionInfoSnapshot notifyWindowsDrawn(@NonNull ActivityRecord r) {
        if (DEBUG_METRICS) Slog.i(TAG, "notifyWindowsDrawn " + r);

        final long timestampNs = SystemClock.uptimeNanos();
        final TransitionInfo info = getActiveTransitionInfo(r);
        if (info == null || info.mIsDrawn) {
            if (DEBUG_METRICS) Slog.i(TAG, "notifyWindowsDrawn not pending drawn " + info);
            return null;
        }
        // Always calculate the delay because the caller may need to know the individual drawn time.
        info.mWindowsDrawnDelayMs = info.calculateDelay(timestampNs);
        info.mIsDrawn = true;
        final TransitionInfoSnapshot infoSnapshot = new TransitionInfoSnapshot(info);
        if (info.mLoggedTransitionStarting || (!r.mDisplayContent.mOpeningApps.contains(r)
                && !r.mTransitionController.isCollecting(r))) {
            done(false /* abort */, info, "notifyWindowsDrawn", timestampNs);
        }

        if (android.app.Flags.appStartInfoTimestamps()) {
            // Log here to match StatsD for time to first frame.
            mLoggerHandler.post(
                    () -> mSupervisor.mService.mWindowManager.mAmInternal.addStartInfoTimestamp(
                            ApplicationStartInfo.START_TIMESTAMP_FIRST_FRAME,
                            timestampNs, r.getUid(), r.getPid(),
                            info.mLastLaunchedActivity.mUserId));
        }

        return infoSnapshot;
    }

    /**
     * Notifies the tracker that the starting window was drawn.
     */
    void notifyStartingWindowDrawn(@NonNull ActivityRecord r) {
        final TransitionInfo info = getActiveTransitionInfo(r);
        if (info == null || info.mLoggedStartingWindowDrawn) {
            return;
        }
        if (DEBUG_METRICS) Slog.i(TAG, "notifyStartingWindowDrawn " + r);
        info.mLoggedStartingWindowDrawn = true;
        info.mStartingWindowDelayMs = info.calculateCurrentDelay();
    }

    /**
     * Notifies the tracker that the app transition is starting.
     *
     * @param activityToReason A map from activity to a reason integer, which must be on of
     *                         ActivityTaskManagerInternal.APP_TRANSITION_* reasons.
     */
    void notifyTransitionStarting(ArrayMap<WindowContainer, Integer> activityToReason) {
        if (DEBUG_METRICS) Slog.i(TAG, "notifyTransitionStarting " + activityToReason);

        final long timestampNs = SystemClock.uptimeNanos();
        for (int index = activityToReason.size() - 1; index >= 0; index--) {
            final WindowContainer<?> wc = activityToReason.keyAt(index);
            final ActivityRecord activity = wc.asActivityRecord();
            final ActivityRecord r = activity != null ? activity
                    : wc.getTopActivity(false /* includeFinishing */, true /* includeOverlays */);
            final TransitionInfo info = getActiveTransitionInfo(r);
            if (info == null || info.mLoggedTransitionStarting) {
                // Ignore any subsequent notifyTransitionStarting.
                continue;
            }
            if (DEBUG_METRICS) {
                Slog.i(TAG, "notifyTransitionStarting activity=" + wc + " info=" + info);
            }

            info.mCurrentTransitionDelayMs = info.calculateDelay(timestampNs);
            info.mReason = activityToReason.valueAt(index);
            info.mLoggedTransitionStarting = true;
            if (info.mIsDrawn) {
                done(false /* abort */, info, "notifyTransitionStarting drawn", timestampNs);
            }
        }
    }

    void notifyActivityRelaunched(ActivityRecord r) {
        final TransitionInfo info = getActiveTransitionInfo(r);
        if (info != null) {
            info.mRelaunched = true;
        }
    }

    /** Makes sure that the reference to the removed activity is cleared. */
    void notifyActivityRemoved(@NonNull ActivityRecord r) {
        mLastTransitionInfo.remove(r);
        final TransitionInfo info = getActiveTransitionInfo(r);
        if (info != null) {
            abort(info, "removed");
        }

        final int packageUid = r.info.applicationInfo.uid;
        final PackageCompatStateInfo compatStateInfo = mPackageUidToCompatStateInfo.get(packageUid);
        if (compatStateInfo == null) {
            return;
        }

        compatStateInfo.mVisibleActivities.remove(r);
        if (compatStateInfo.mLastLoggedActivity == r) {
            compatStateInfo.mLastLoggedActivity = null;
        }
    }

    /**
     * Notifies the tracker that the visibility of an app is changing.
     *
     * @param r the app that is changing its visibility
     */
    void notifyVisibilityChanged(@NonNull ActivityRecord r) {
        final TransitionInfo info = getActiveTransitionInfo(r);
        if (info == null) {
            return;
        }
        if (DEBUG_METRICS) {
            Slog.i(TAG, "notifyVisibilityChanged " + r + " visible=" + r.isVisibleRequested()
                    + " state=" + r.getState() + " finishing=" + r.finishing);
        }
        if (r.isState(ActivityRecord.State.RESUMED) && r.mDisplayContent.isSleeping()) {
            // The activity may be launching while keyguard is locked. The keyguard may be dismissed
            // after the activity finished relayout, so skip the visibility check to avoid aborting
            // the tracking of launch event.
            return;
        }
        if (!r.isVisibleRequested() || r.finishing) {
            // Check if the tracker can be cancelled because the last launched activity may be
            // no longer visible.
            scheduleCheckActivityToBeDrawn(r, 0 /* delay */);
        }
    }

    private void scheduleCheckActivityToBeDrawn(@NonNull ActivityRecord r, long delay) {
        // The activity and its task are passed separately because it is possible that the activity
        // is removed from the task later.
        r.mAtmService.mH.sendMessageDelayed(PooledLambda.obtainMessage(
                ActivityMetricsLogger::checkActivityToBeDrawn, this, r.getTask(), r), delay);
    }

    /** Cancels the tracking of launch if there won't be an activity to be drawn. */
    private void checkActivityToBeDrawn(Task t, ActivityRecord r) {
        synchronized (mSupervisor.mService.mGlobalLock) {
            final TransitionInfo info = getActiveTransitionInfo(r);

            // If we have an active transition that's waiting on a certain activity that will be
            // invisible now, we'll never get onWindowsDrawn, so abort the transition if necessary.

            // We have no active transitions. Or the notified activity whose visibility changed is
            // no longer the launched activity, then we can still wait to get onWindowsDrawn.
            if (info == null) {
                return;
            }

            // If the task of the launched activity contains any activity to be drawn, then the
            // window drawn event should report later to complete the transition. Otherwise all
            // activities in this task may be finished, invisible or drawn, so the transition event
            // should be cancelled.
            if (t != null && t.forAllActivities(
                    a -> a.isVisibleRequested() && !a.isReportedDrawn() && !a.finishing)) {
                return;
            }

            if (DEBUG_METRICS) Slog.i(TAG, "checkActivityToBeDrawn cancels activity=" + r);
            logAppTransitionCancel(info);
            abort(info, "checkActivityToBeDrawn (invisible or drawn already)");
        }
    }

    @Nullable
    private AppHibernationManagerInternal getAppHibernationManagerInternal() {
        if (!AppHibernationService.isAppHibernationEnabled()) return null;
        if (mAppHibernationManagerInternal == null) {
            mAppHibernationManagerInternal =
                    LocalServices.getService(AppHibernationManagerInternal.class);
        }
        return mAppHibernationManagerInternal;
    }

    /**
     * Notifies the tracker before the package is unstopped because of launching activity.
     * @param packageName The package to be unstopped.
     */
    void notifyBeforePackageUnstopped(@NonNull String packageName) {
        final AppHibernationManagerInternal ahmInternal = getAppHibernationManagerInternal();
        if (ahmInternal != null) {
            mLastHibernationStates.put(packageName, ahmInternal.isHibernatingGlobally(packageName));
        }
    }

    /**
     * Notifies the tracker that we called immediately before we call bindApplication on the client.
     *
     * @param appInfo The client into which we'll call bindApplication.
     */
    void notifyBindApplication(ApplicationInfo appInfo) {
        for (int i = mTransitionInfoList.size() - 1; i >= 0; i--) {
            final TransitionInfo info = mTransitionInfoList.get(i);

            // App isn't attached to record yet, so match with info.
            if (info.mLastLaunchedActivity.info.applicationInfo == appInfo) {
                info.mBindApplicationDelayMs = info.calculateCurrentDelay();
                if (info.mProcessRunning) {
                    // It was HOT/WARM launch, but the process was died somehow right after the
                    // launch request.
                    info.mProcessRunning = false;
                    info.mTransitionType = TYPE_TRANSITION_COLD_LAUNCH;
                    final String msg = "Process " + info.mLastLaunchedActivity.info.processName
                            + " restarted";
                    Slog.i(TAG, msg);
                    if (info.mLaunchingState.mTraceName != null) {
                        Trace.instant(Trace.TRACE_TAG_ACTIVITY_MANAGER, msg + "#"
                                + LaunchingState.sTraceSeqId);
                    }
                }
            }
        }
    }

    private void abort(@NonNull LaunchingState state, String cause) {
        if (state.mAssociatedTransitionInfo != null) {
            abort(state.mAssociatedTransitionInfo, cause);
            return;
        }
        if (DEBUG_METRICS) Slog.i(TAG, "abort launch cause=" + cause);
        state.stopTrace(true /* abort */, null /* endInfo */);
        launchObserverNotifyIntentFailed(state.mStartUptimeNs);
    }

    /** Aborts tracking of current launch metrics. */
    private void abort(@NonNull TransitionInfo info, String cause) {
        done(true /* abort */, info, cause, 0L /* timestampNs */);
    }

    /** Called when the given transition (info) is no longer active. */
    private void done(boolean abort, @NonNull TransitionInfo info, String cause,
            long timestampNs) {
        if (DEBUG_METRICS) {
            Slog.i(TAG, "done abort=" + abort + " cause=" + cause + " timestamp=" + timestampNs
                    + " info=" + info);
        }
        info.mLaunchingState.stopTrace(abort, info);
        stopLaunchTrace(info);
        final Boolean isHibernating =
                mLastHibernationStates.remove(info.mLastLaunchedActivity.packageName);
        if (abort) {
            mLastTransitionInfo.remove(info.mLastLaunchedActivity);
            mSupervisor.stopWaitingForActivityVisible(info.mLastLaunchedActivity);
            launchObserverNotifyActivityLaunchCancelled(info);
        } else {
            if (info.isInterestingToLoggerAndObserver()) {
                launchObserverNotifyActivityLaunchFinished(info, timestampNs);
            }
            logAppTransitionFinished(info, isHibernating != null ? isHibernating : false);
            if (info.mReason == APP_TRANSITION_RECENTS_ANIM) {
                logRecentsAnimationLatency(info);
            }
        }
        mTransitionInfoList.remove(info);
    }

    private void logAppTransitionCancel(TransitionInfo info) {
        final int type = info.mTransitionType;
        final ActivityRecord activity = info.mLastLaunchedActivity;
        final LogMaker builder = new LogMaker(APP_TRANSITION_CANCELLED);
        builder.setPackageName(activity.packageName);
        builder.setType(type);
        builder.addTaggedData(FIELD_CLASS_NAME, activity.info.name);
        mMetricsLogger.write(builder);
        FrameworkStatsLog.write(
                FrameworkStatsLog.APP_START_CANCELED,
                activity.info.applicationInfo.uid,
                activity.packageName,
                getAppStartTransitionType(type, info.mRelaunched),
                activity.info.name);
        if (DEBUG_METRICS) {
            Slog.i(TAG, String.format("APP_START_CANCELED(%s, %s, %s, %s)",
                    activity.info.applicationInfo.uid,
                    activity.packageName,
                    getAppStartTransitionType(type, info.mRelaunched),
                    activity.info.name));
        }
    }

    private void logAppTransitionFinished(@NonNull TransitionInfo info, boolean isHibernating) {
        if (DEBUG_METRICS) Slog.i(TAG, "logging finished transition " + info);

        // Take a snapshot of the transition info before sending it to the handler for logging.
        // This will avoid any races with other operations that modify the ActivityRecord.
        final TransitionInfoSnapshot infoSnapshot = new TransitionInfoSnapshot(info);
        final boolean isOpaque = info.mLastLaunchedActivity.mStyleFillsParent;
        final long uptimeNs = info.mLaunchingState.mStartUptimeNs;
        final int transitionDelay = info.mCurrentTransitionDelayMs;
        final int processState = info.mProcessState;
        final int processOomAdj = info.mProcessOomAdj;
        mLoggerHandler.post(() -> {
            if (info.isInterestingToLoggerAndObserver()) {
                logAppTransition(uptimeNs, transitionDelay, infoSnapshot, isHibernating,
                        processState, processOomAdj);
            }
            if (info.mIsInTaskActivityStart) {
                logInTaskActivityStart(infoSnapshot, isOpaque, transitionDelay);
            }
            if (infoSnapshot.isInterestedToEventLog()) {
                logAppDisplayed(infoSnapshot);
            }
        });
        if (info.mPendingFullyDrawn != null) {
            info.mPendingFullyDrawn.run();
        }

        info.mLastLaunchedActivity.info.launchToken = null;
    }

    // This gets called on another thread without holding the activity manager lock.
    private void logAppTransition(long transitionDeviceUptimeNs,
            int currentTransitionDelayMs, TransitionInfoSnapshot info, boolean isHibernating,
            int processState, int processOomAdj) {
        final LogMaker builder = new LogMaker(APP_TRANSITION);
        builder.setPackageName(info.packageName);
        builder.setType(info.type);
        builder.addTaggedData(FIELD_CLASS_NAME, info.launchedActivityName);
        final boolean isInstantApp = info.applicationInfo.isInstantApp();
        if (info.launchedActivityLaunchedFromPackage != null) {
            builder.addTaggedData(APP_TRANSITION_CALLING_PACKAGE_NAME,
                    info.launchedActivityLaunchedFromPackage);
        }
        String launchToken = info.launchedActivityLaunchToken;
        if (launchToken != null) {
            builder.addTaggedData(FIELD_INSTANT_APP_LAUNCH_TOKEN, launchToken);
        }
        builder.addTaggedData(APP_TRANSITION_IS_EPHEMERAL, isInstantApp ? 1 : 0);
        builder.addTaggedData(APP_TRANSITION_DEVICE_UPTIME_SECONDS,
                TimeUnit.NANOSECONDS.toSeconds(transitionDeviceUptimeNs));
        builder.addTaggedData(APP_TRANSITION_DELAY_MS, currentTransitionDelayMs);
        builder.setSubtype(info.reason);
        if (info.startingWindowDelayMs != INVALID_DELAY) {
            builder.addTaggedData(APP_TRANSITION_STARTING_WINDOW_DELAY_MS,
                    info.startingWindowDelayMs);
        }
        if (info.bindApplicationDelayMs != INVALID_DELAY) {
            builder.addTaggedData(APP_TRANSITION_BIND_APPLICATION_DELAY_MS,
                    info.bindApplicationDelayMs);
        }
        builder.addTaggedData(APP_TRANSITION_WINDOWS_DRAWN_DELAY_MS, info.windowsDrawnDelayMs);
        final PackageOptimizationInfo packageOptimizationInfo =
                info.getPackageOptimizationInfo(getArtManagerInternal());
        builder.addTaggedData(PACKAGE_OPTIMIZATION_COMPILATION_REASON,
                packageOptimizationInfo.getCompilationReason());
        builder.addTaggedData(PACKAGE_OPTIMIZATION_COMPILATION_FILTER,
                packageOptimizationInfo.getCompilationFilter());
        mMetricsLogger.write(builder);

        // Incremental info
        boolean isIncremental = false, isLoading = false;
        final String codePath = info.applicationInfo.getCodePath();
        if (codePath != null && IncrementalManager.isIncrementalPath(codePath)) {
            isIncremental = true;
            isLoading = isIncrementalLoading(info.packageName, info.userId);
        }
        final boolean stopped = wasStoppedNeedsLogging(info);
        final int packageState = stopped
                ? APP_START_OCCURRED__PACKAGE_STOPPED_STATE__PACKAGE_STATE_STOPPED
                : APP_START_OCCURRED__PACKAGE_STOPPED_STATE__PACKAGE_STATE_NORMAL;

        final boolean firstLaunch = wasFirstLaunch(info);
        FrameworkStatsLog.write(
                FrameworkStatsLog.APP_START_OCCURRED,
                info.applicationInfo.uid,
                info.packageName,
                getAppStartTransitionType(info.type, info.relaunched),
                info.launchedActivityName,
                info.launchedActivityLaunchedFromPackage,
                isInstantApp,
                0 /* deprecated transitionDeviceUptimeMs */,
                info.reason,
                currentTransitionDelayMs,
                info.startingWindowDelayMs,
                info.bindApplicationDelayMs,
                info.windowsDrawnDelayMs,
                launchToken,
                packageOptimizationInfo.getCompilationReason(),
                packageOptimizationInfo.getCompilationFilter(),
                info.sourceType,
                info.sourceEventDelayMs,
                isHibernating,
                isIncremental,
                isLoading,
                info.launchedActivityName.hashCode(),
                TimeUnit.NANOSECONDS.toMillis(info.timestampNs),
                processState,
                processOomAdj,
                packageState,
                false, // is_xr_activity
                firstLaunch,
                0L /* TODO: stoppedDuration */,
                info.multiWindowLaunchType);
        // Reset the stopped state to avoid reporting stopped again
        if (info.processRecord != null) {
            info.processRecord.setWasStoppedLogged(true);
        }

        if (DEBUG_METRICS) {
            Slog.i(TAG, String.format(
                    "APP_START_OCCURRED(%s, %s, %s, %s, %s, wasStopped=%b, firstLaunch=%b)",
                    info.applicationInfo.uid,
                    info.packageName,
                    getAppStartTransitionType(info.type, info.relaunched),
                    info.launchedActivityName,
                    info.launchedActivityLaunchedFromPackage,
                    stopped, firstLaunch));
        }

        logAppStartMemoryStateCapture(info);
    }

    private boolean isIncrementalLoading(String packageName, int userId) {
        final IncrementalStatesInfo info = mSupervisor.mService.getPackageManagerInternalLocked()
                .getIncrementalStatesInfo(packageName, 0 /* filterCallingUid */, userId);
        return info != null && info.isLoading();
    }

    @VisibleForTesting
    void logInTaskActivityStart(TransitionInfoSnapshot info, boolean isOpaque,
            int transitionDelayMs) {
        if (DEBUG_METRICS) {
            Slog.i(TAG, "IN_TASK_ACTIVITY_STARTED " + info.launchedActivityName
                    + " transitionDelayMs=" + transitionDelayMs + "ms");
        }
        FrameworkStatsLog.write(FrameworkStatsLog.IN_TASK_ACTIVITY_STARTED,
                info.applicationInfo.uid,
                getAppStartTransitionType(info.type, info.relaunched),
                isOpaque,
                transitionDelayMs,
                info.windowsDrawnDelayMs,
                TimeUnit.NANOSECONDS.toMillis(info.timestampNs));
    }

    private void logAppDisplayed(TransitionInfoSnapshot info) {
        EventLog.writeEvent(WM_ACTIVITY_LAUNCH_TIME,
                info.userId, info.activityRecordIdHashCode, info.launchedActivityShortComponentName,
                info.windowsDrawnDelayMs);

        StringBuilder sb = mStringBuilder;
        sb.setLength(0);
        sb.append("Displayed ");
        sb.append(info.launchedActivityShortComponentName);
        sb.append(" for user ");
        sb.append(info.userId);
        sb.append(": ");
        TimeUtils.formatDuration(info.windowsDrawnDelayMs, sb);
        Log.i(TAG, sb.toString());
    }

    private void logRecentsAnimationLatency(TransitionInfo info) {
        final int duration = info.mSourceEventDelayMs + info.mWindowsDrawnDelayMs;
        final ActivityRecord r = info.mLastLaunchedActivity;
        final long lastTopLossTime = r.topResumedStateLossTime;
        final WindowManagerService wm = mSupervisor.mService.mWindowManager;
        final Object controller = wm.getRecentsAnimationController();
        mLoggerHandler.postDelayed(() -> {
            if (lastTopLossTime != r.topResumedStateLossTime
                    || controller != wm.getRecentsAnimationController()) {
                // Skip if the animation was finished in a short time.
                return;
            }
            wm.mLatencyTracker.logAction(LatencyTracker.ACTION_START_RECENTS_ANIMATION, duration);
        }, LATENCY_TRACKER_RECENTS_DELAY_MS);
    }

    private static int getAppStartTransitionType(int tronType, boolean relaunched) {
        if (tronType == TYPE_TRANSITION_COLD_LAUNCH) {
            return FrameworkStatsLog.APP_START_OCCURRED__TYPE__COLD;
        }
        if (tronType == TYPE_TRANSITION_WARM_LAUNCH) {
            return FrameworkStatsLog.APP_START_OCCURRED__TYPE__WARM;
        }
        if (tronType == TYPE_TRANSITION_HOT_LAUNCH) {
            return relaunched
                    ? FrameworkStatsLog.APP_START_OCCURRED__TYPE__RELAUNCH
                    : FrameworkStatsLog.APP_START_OCCURRED__TYPE__HOT;
        }
        return FrameworkStatsLog.APP_START_OCCURRED__TYPE__UNKNOWN;
    }

    /** @see android.app.Activity#reportFullyDrawn */
    TransitionInfoSnapshot notifyFullyDrawn(ActivityRecord r, boolean restoredFromBundle) {
        final TransitionInfo info = mLastTransitionInfo.get(r);
        if (info == null) {
            return null;
        }
        if (!info.mIsDrawn && info.mPendingFullyDrawn == null) {
            // There are still undrawn activities, postpone reporting fully drawn until all of its
            // windows are drawn. So that is closer to an usable state.
            info.mPendingFullyDrawn = () -> {
                notifyFullyDrawn(r, restoredFromBundle);
                info.mPendingFullyDrawn = null;
            };
            return null;
        }

        final long currentTimestampNs = SystemClock.uptimeNanos();
        final long startupTimeMs = info.mPendingFullyDrawn != null
                ? info.mWindowsDrawnDelayMs
                : TimeUnit.NANOSECONDS.toMillis(
                        currentTimestampNs - info.mLaunchingState.mStartUptimeNs);
        final TransitionInfoSnapshot infoSnapshot =
                new TransitionInfoSnapshot(info, r, (int) startupTimeMs);
        if (infoSnapshot.isInterestedToEventLog()) {
            mLoggerHandler.post(() -> logAppFullyDrawn(infoSnapshot));
        }
        mLastTransitionInfo.remove(r);

        if (!info.isInterestingToLoggerAndObserver()) {
            return infoSnapshot;
        }

        // Record the handling of the reportFullyDrawn callback in the trace system. This is not
        // actually used to trace this function, but instead the logical task that this function
        // fullfils (handling reportFullyDrawn() callbacks).
        Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER,
                "ActivityManager:ReportingFullyDrawn " + info.mLastLaunchedActivity.packageName);
        mLoggerHandler.post(() -> logAppFullyDrawnMetrics(infoSnapshot, restoredFromBundle,
                info.mProcessRunning));
        // Ends the trace started at the beginning of this function. This is located here to allow
        // the trace slice to have a noticable duration.
        Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);

        // Notify reportFullyDrawn event.
        launchObserverNotifyReportFullyDrawn(info, currentTimestampNs);

        return infoSnapshot;
    }

    private void logAppFullyDrawnMetrics(TransitionInfoSnapshot info, boolean restoredFromBundle,
            boolean processRunning) {
        final LogMaker builder = new LogMaker(APP_TRANSITION_REPORTED_DRAWN);
        builder.setPackageName(info.packageName);
        builder.addTaggedData(FIELD_CLASS_NAME, info.launchedActivityName);
        builder.addTaggedData(APP_TRANSITION_REPORTED_DRAWN_MS,
                (long) info.windowsFullyDrawnDelayMs);
        builder.setType(restoredFromBundle
                ? TYPE_TRANSITION_REPORTED_DRAWN_WITH_BUNDLE
                : TYPE_TRANSITION_REPORTED_DRAWN_NO_BUNDLE);
        builder.addTaggedData(APP_TRANSITION_PROCESS_RUNNING, processRunning ? 1 : 0);
        mMetricsLogger.write(builder);
        final PackageOptimizationInfo packageOptimizationInfo =
                info.getPackageOptimizationInfo(getArtManagerInternal());
        // Incremental info
        boolean isIncremental = false, isLoading = false;
        final String codePath = info.applicationInfo.getCodePath();
        if (codePath != null && IncrementalManager.isIncrementalPath(codePath)) {
            isIncremental = true;
            isLoading = isIncrementalLoading(info.packageName, info.userId);
        }
        FrameworkStatsLog.write(
                FrameworkStatsLog.APP_START_FULLY_DRAWN,
                info.applicationInfo.uid,
                info.packageName,
                restoredFromBundle
                        ? FrameworkStatsLog.APP_START_FULLY_DRAWN__TYPE__WITH_BUNDLE
                        : FrameworkStatsLog.APP_START_FULLY_DRAWN__TYPE__WITHOUT_BUNDLE,
                info.launchedActivityName,
                processRunning,
                info.windowsFullyDrawnDelayMs,
                packageOptimizationInfo.getCompilationReason(),
                packageOptimizationInfo.getCompilationFilter(),
                info.sourceType,
                info.sourceEventDelayMs,
                isIncremental,
                isLoading,
                info.launchedActivityName.hashCode(),
                TimeUnit.NANOSECONDS.toMillis(info.timestampNs));
    }

    private void logAppFullyDrawn(TransitionInfoSnapshot info) {
        StringBuilder sb = mStringBuilder;
        sb.setLength(0);
        sb.append("Fully drawn ");
        sb.append(info.launchedActivityShortComponentName);
        sb.append(": ");
        TimeUtils.formatDuration(info.windowsFullyDrawnDelayMs, sb);
        Log.i(TAG, sb.toString());
    }

    void logAbortedBgActivityStart(Intent intent, WindowProcessController callerApp,
            int callingUid, String callingPackage, int callingUidProcState,
            boolean callingUidHasAnyVisibleWindow,
            int realCallingUid, int realCallingUidProcState,
            boolean realCallingUidHasAnyVisibleWindow,
            boolean comingFromPendingIntent) {

        final long nowElapsed = SystemClock.elapsedRealtime();
        final long nowUptime = SystemClock.uptimeMillis();
        final LogMaker builder = new LogMaker(ACTION_ACTIVITY_START);
        builder.setTimestamp(System.currentTimeMillis());
        builder.addTaggedData(FIELD_CALLING_UID, callingUid);
        builder.addTaggedData(FIELD_CALLING_PACKAGE_NAME, callingPackage);
        builder.addTaggedData(FIELD_CALLING_UID_PROC_STATE,
                processStateAmToProto(callingUidProcState));
        builder.addTaggedData(FIELD_CALLING_UID_HAS_ANY_VISIBLE_WINDOW,
                callingUidHasAnyVisibleWindow ? 1 : 0);
        builder.addTaggedData(FIELD_REAL_CALLING_UID, realCallingUid);
        builder.addTaggedData(FIELD_REAL_CALLING_UID_PROC_STATE,
                processStateAmToProto(realCallingUidProcState));
        builder.addTaggedData(FIELD_REAL_CALLING_UID_HAS_ANY_VISIBLE_WINDOW,
                realCallingUidHasAnyVisibleWindow ? 1 : 0);
        builder.addTaggedData(FIELD_COMING_FROM_PENDING_INTENT, comingFromPendingIntent ? 1 : 0);
        if (intent != null) {
            builder.addTaggedData(FIELD_INTENT_ACTION, intent.getAction());
            ComponentName component = intent.getComponent();
            if (component != null) {
                builder.addTaggedData(FIELD_TARGET_SHORT_COMPONENT_NAME,
                        component.flattenToShortString());
            }
        }
        if (callerApp != null) {
            builder.addTaggedData(FIELD_PROCESS_RECORD_PROCESS_NAME, callerApp.mName);
            builder.addTaggedData(FIELD_PROCESS_RECORD_CUR_PROC_STATE,
                    processStateAmToProto(callerApp.getCurrentProcState()));
            builder.addTaggedData(FIELD_PROCESS_RECORD_HAS_CLIENT_ACTIVITIES,
                    callerApp.hasClientActivities() ? 1 : 0);
            builder.addTaggedData(FIELD_PROCESS_RECORD_HAS_FOREGROUND_SERVICES,
                    callerApp.hasForegroundServices() ? 1 : 0);
            builder.addTaggedData(FIELD_PROCESS_RECORD_HAS_FOREGROUND_ACTIVITIES,
                    callerApp.hasForegroundActivities() ? 1 : 0);
            builder.addTaggedData(FIELD_PROCESS_RECORD_HAS_TOP_UI, callerApp.hasTopUi() ? 1 : 0);
            builder.addTaggedData(FIELD_PROCESS_RECORD_HAS_OVERLAY_UI,
                    callerApp.hasOverlayUi() ? 1 : 0);
            builder.addTaggedData(FIELD_PROCESS_RECORD_PENDING_UI_CLEAN,
                    callerApp.hasPendingUiClean() ? 1 : 0);
            if (callerApp.getInteractionEventTime() != 0) {
                builder.addTaggedData(FIELD_PROCESS_RECORD_MILLIS_SINCE_LAST_INTERACTION_EVENT,
                        (nowElapsed - callerApp.getInteractionEventTime()));
            }
            if (callerApp.getFgInteractionTime() != 0) {
                builder.addTaggedData(FIELD_PROCESS_RECORD_MILLIS_SINCE_FG_INTERACTION,
                        (nowElapsed - callerApp.getFgInteractionTime()));
            }
            if (callerApp.getWhenUnimportant() != 0) {
                builder.addTaggedData(FIELD_PROCESS_RECORD_MILLIS_SINCE_UNIMPORTANT,
                        (nowUptime - callerApp.getWhenUnimportant()));
            }
        }
        mMetricsLogger.write(builder);
    }

    private void logAppStartMemoryStateCapture(TransitionInfoSnapshot info) {
        if (info.processRecord == null) {
            if (DEBUG_METRICS) Slog.i(TAG, "logAppStartMemoryStateCapture processRecord null");
            return;
        }

        final int pid = info.processRecord.getPid();
        final int uid = info.applicationInfo.uid;
        final MemoryStat memoryStat = readMemoryStatFromFilesystem(uid, pid);
        if (memoryStat == null) {
            if (DEBUG_METRICS) Slog.i(TAG, "logAppStartMemoryStateCapture memoryStat null");
            return;
        }

        FrameworkStatsLog.write(
                FrameworkStatsLog.APP_START_MEMORY_STATE_CAPTURED,
                uid,
                info.processName,
                info.launchedActivityName,
                memoryStat.pgfault,
                memoryStat.pgmajfault,
                memoryStat.rssInBytes,
                memoryStat.cacheInBytes,
                memoryStat.swapInBytes);
    }

    /**
     * Logs the current App Compat state of the given {@link ActivityRecord} with its package
     * UID, if all of the following hold:
     * <ul>
     *   <li>The current state is different than the last logged state for the package UID of the
     *   activity.
     *   <li>If the current state is NOT_VISIBLE, there is a previously logged state for the
     *   package UID and there are no other visible activities with the same package UID.
     *   <li>The last logged activity with the same package UID is either {@code activity} (or an
     *   activity that has been removed) or the last logged state is NOT_VISIBLE or NOT_LETTERBOXED.
     * </ul>
     *
     * <p>If the current state is NOT_VISIBLE and the previous state which was logged by {@code
     * activity} (or an activity that has been removed) wasn't, looks for the first visible activity
     * with the same package UID that has a letterboxed state, or a non-letterboxed state if
     * there isn't one, and logs that state.
     *
     * <p>This method assumes that the caller is wrapping the call with a synchronized block so
     * that there won't be a race condition between two activities with the same package.
     */
    void logAppCompatState(@NonNull ActivityRecord activity) {
        final int packageUid = activity.info.applicationInfo.uid;
        final int state = activity.getAppCompatState();

        if (!mPackageUidToCompatStateInfo.contains(packageUid)) {
            mPackageUidToCompatStateInfo.put(packageUid, new PackageCompatStateInfo());
        }
        final PackageCompatStateInfo compatStateInfo = mPackageUidToCompatStateInfo.get(packageUid);
        final int lastLoggedState = compatStateInfo.mLastLoggedState;
        final ActivityRecord lastLoggedActivity = compatStateInfo.mLastLoggedActivity;

        final boolean isVisible = state != APP_COMPAT_STATE_CHANGED__STATE__NOT_VISIBLE;
        final ArrayList<ActivityRecord> visibleActivities = compatStateInfo.mVisibleActivities;
        if (isVisible && !visibleActivities.contains(activity)) {
            visibleActivities.add(activity);
        } else if (!isVisible) {
            visibleActivities.remove(activity);
            if (visibleActivities.isEmpty()) {
                // No need to keep the entry if there are no visible activities.
                mPackageUidToCompatStateInfo.remove(packageUid);
            }
        }

        if (state == lastLoggedState) {
            // We don’t want to log the same state twice or log DEFAULT_NOT_VISIBLE before any
            // visible state was logged.
            return;
        }

        if (!isVisible && !visibleActivities.isEmpty()) {
            // There is another visible activity for this package UID.
            if (lastLoggedActivity == null || activity == lastLoggedActivity) {
                // Make sure a new visible state is logged if needed.
                findAppCompatStateToLog(compatStateInfo, packageUid);
            }
            return;
        }

        if (lastLoggedActivity != null && activity != lastLoggedActivity
                && lastLoggedState != APP_COMPAT_STATE_CHANGED__STATE__NOT_VISIBLE
                && lastLoggedState != APP_COMPAT_STATE_CHANGED__STATE__NOT_LETTERBOXED) {
            // Another visible activity for this package UID has logged a letterboxed state.
            return;
        }

        logAppCompatStateInternal(activity, state, compatStateInfo);
    }

    /**
     * Looks for the first visible activity in {@code compatStateInfo} that has a letterboxed
     * state, or a non-letterboxed state if there isn't one, and logs that state for the given
     * {@code packageUid}.
     *
     * <p>If there is a visible activity in {@code compatStateInfo} with the same state as the
     * last logged state for the given {@code packageUid}, changes the last logged activity to
     * reference the first such activity without actually logging the same state twice.
     */
    private void findAppCompatStateToLog(PackageCompatStateInfo compatStateInfo, int packageUid) {
        final ArrayList<ActivityRecord> visibleActivities = compatStateInfo.mVisibleActivities;
        final int lastLoggedState = compatStateInfo.mLastLoggedState;

        ActivityRecord activityToLog = null;
        int stateToLog = APP_COMPAT_STATE_CHANGED__STATE__NOT_VISIBLE;
        for (int i = 0; i < visibleActivities.size(); i++) {
            ActivityRecord activity = visibleActivities.get(i);
            int state = activity.getAppCompatState();
            if (state == lastLoggedState) {
                // Change last logged activity without logging the same state twice.
                compatStateInfo.mLastLoggedActivity = activity;
                return;
            }
            if (state == APP_COMPAT_STATE_CHANGED__STATE__NOT_VISIBLE) {
                // This shouldn't happen.
                Slog.w(TAG, "Visible activity with NOT_VISIBLE App Compat state for package UID: "
                        + packageUid);
                continue;
            }
            if (stateToLog == APP_COMPAT_STATE_CHANGED__STATE__NOT_VISIBLE || (
                    stateToLog == APP_COMPAT_STATE_CHANGED__STATE__NOT_LETTERBOXED
                            && state != APP_COMPAT_STATE_CHANGED__STATE__NOT_LETTERBOXED)) {
                activityToLog = activity;
                stateToLog = state;
            }
        }
        if (activityToLog != null && stateToLog != APP_COMPAT_STATE_CHANGED__STATE__NOT_VISIBLE) {
            logAppCompatStateInternal(activityToLog, stateToLog, compatStateInfo);
        }
    }

    private static boolean isAppCompateStateChangedToLetterboxed(int state) {
        return state == APP_COMPAT_STATE_CHANGED__STATE__LETTERBOXED_FOR_ASPECT_RATIO
                || state == APP_COMPAT_STATE_CHANGED__STATE__LETTERBOXED_FOR_FIXED_ORIENTATION
                || state == APP_COMPAT_STATE_CHANGED__STATE__LETTERBOXED_FOR_SIZE_COMPAT_MODE;
    }

    private void logAppCompatStateInternal(@NonNull ActivityRecord activity, int state,
             PackageCompatStateInfo compatStateInfo) {
        compatStateInfo.mLastLoggedState = state;
        compatStateInfo.mLastLoggedActivity = activity;
        int packageUid = activity.info.applicationInfo.uid;

        int positionToLog = APP_COMPAT_STATE_CHANGED__LETTERBOX_POSITION__NOT_LETTERBOXED_POSITION;
        if (isAppCompateStateChangedToLetterboxed(state)) {
            positionToLog = activity.mLetterboxUiController.getLetterboxPositionForLogging();
        }
        FrameworkStatsLog.write(FrameworkStatsLog.APP_COMPAT_STATE_CHANGED,
                packageUid, state, positionToLog);

        if (DEBUG_METRICS) {
            Slog.i(TAG, String.format("APP_COMPAT_STATE_CHANGED(%s, %s, %s)",
                    packageUid, state, positionToLog));
        }
    }

    /**
     * Logs the changing of the letterbox position along with its package UID
     */
    void logLetterboxPositionChange(@NonNull ActivityRecord activity, int position) {
        int packageUid = activity.info.applicationInfo.uid;
        FrameworkStatsLog.write(FrameworkStatsLog.LETTERBOX_POSITION_CHANGED, packageUid, position);

        if (!mPackageUidToCompatStateInfo.contains(packageUid)) {
            // There is no last logged activity for this packageUid so we should not log the
            // position change as we can only log the position change for the current activity
            return;
        }
        final PackageCompatStateInfo compatStateInfo = mPackageUidToCompatStateInfo.get(packageUid);
        final ActivityRecord lastLoggedActivity = compatStateInfo.mLastLoggedActivity;
        if (activity != lastLoggedActivity) {
            // Only log the position change for the current activity to be consistent with
            // findAppCompatStateToLog and ensure that metrics for the state changes are computed
            // correctly
            return;
        }
        int state = activity.getAppCompatState();
        logAppCompatStateInternal(activity, state, compatStateInfo);

        if (DEBUG_METRICS) {
            Slog.i(TAG, String.format("LETTERBOX_POSITION_CHANGED(%s, %s)",
                    packageUid, position));
        }
    }

    /**
     * Logs the Camera Compat Control appeared event that corresponds to the given {@code state}
     * with the given {@code packageUid}.
     */
    void logCameraCompatControlAppearedEventReported(@CameraCompatControlState int state,
            int packageUid) {
        switch (state) {
            case CAMERA_COMPAT_CONTROL_TREATMENT_SUGGESTED:
                logCameraCompatControlEventReported(
                        CAMERA_COMPAT_CONTROL_EVENT_REPORTED__EVENT__APPEARED_APPLY_TREATMENT,
                        packageUid);
                break;
            case CAMERA_COMPAT_CONTROL_TREATMENT_APPLIED:
                logCameraCompatControlEventReported(
                        CAMERA_COMPAT_CONTROL_EVENT_REPORTED__EVENT__APPEARED_REVERT_TREATMENT,
                        packageUid);
                break;
            case CAMERA_COMPAT_CONTROL_HIDDEN:
                // Nothing to log.
                break;
            default:
                Slog.w(TAG, "Unexpected state in logCameraCompatControlAppearedEventReported: "
                        + state);
                break;
        }
    }

    /**
     * Logs the Camera Compat Control clicked event that corresponds to the given {@code state}
     * with the given {@code packageUid}.
     */
    void logCameraCompatControlClickedEventReported(@CameraCompatControlState int state,
            int packageUid) {
        switch (state) {
            case CAMERA_COMPAT_CONTROL_TREATMENT_APPLIED:
                logCameraCompatControlEventReported(
                        CAMERA_COMPAT_CONTROL_EVENT_REPORTED__EVENT__CLICKED_APPLY_TREATMENT,
                        packageUid);
                break;
            case CAMERA_COMPAT_CONTROL_TREATMENT_SUGGESTED:
                logCameraCompatControlEventReported(
                        CAMERA_COMPAT_CONTROL_EVENT_REPORTED__EVENT__CLICKED_REVERT_TREATMENT,
                        packageUid);
                break;
            case CAMERA_COMPAT_CONTROL_DISMISSED:
                logCameraCompatControlEventReported(
                        CAMERA_COMPAT_CONTROL_EVENT_REPORTED__EVENT__CLICKED_DISMISS,
                        packageUid);
                break;
            default:
                Slog.w(TAG, "Unexpected state in logCameraCompatControlAppearedEventReported: "
                        + state);
                break;
        }
    }

    private void logCameraCompatControlEventReported(int event, int packageUid) {
        FrameworkStatsLog.write(FrameworkStatsLog.CAMERA_COMPAT_CONTROL_EVENT_REPORTED, packageUid,
                event);
        if (DEBUG_METRICS) {
            Slog.i(TAG, String.format("CAMERA_COMPAT_CONTROL_EVENT_REPORTED(%s, %s)", packageUid,
                    event));
        }
    }

    private ArtManagerInternal getArtManagerInternal() {
        if (mArtManagerInternal == null) {
            // Note that this may be null.
            // ArtManagerInternal is registered during PackageManagerService
            // initialization which happens after ActivityManagerService.
            mArtManagerInternal = LocalServices.getService(ArtManagerInternal.class);
        }
        return mArtManagerInternal;
    }

    /** Starts trace for an activity is actually launching. */
    private void startLaunchTrace(@NonNull TransitionInfo info) {
        if (DEBUG_METRICS) Slog.i(TAG, "startLaunchTrace " + info);
        if (info.mLaunchingState.mTraceName == null) {
            return;
        }
        info.mLaunchTraceName = "launching: " + info.mLastLaunchedActivity.packageName;
        Trace.asyncTraceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER, info.mLaunchTraceName,
                (int) info.mLaunchingState.mStartRealtimeNs /* cookie */);
    }

    /** Stops trace for the launch is completed or cancelled. */
    private void stopLaunchTrace(@NonNull TransitionInfo info) {
        if (DEBUG_METRICS) Slog.i(TAG, "stopLaunchTrace " + info);
        if (info.mLaunchTraceName == null) {
            return;
        }
        Trace.asyncTraceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER, info.mLaunchTraceName,
                (int) info.mLaunchingState.mStartRealtimeNs /* cookie */);
        info.mLaunchTraceName = null;
    }

    public ActivityMetricsLaunchObserverRegistry getLaunchObserverRegistry() {
        return mLaunchObserver;
    }

    /** Notify the {@link ActivityMetricsLaunchObserver} that a new launch sequence has begun. */
    private void launchObserverNotifyIntentStarted(Intent intent, long timestampNs) {
        Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER,
                "MetricsLogger:launchObserverNotifyIntentStarted");

        // Beginning a launch is timing sensitive and so should be observed as soon as possible.
        mLaunchObserver.onIntentStarted(intent, timestampNs);

        Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
    }

    /**
     * Notify the {@link ActivityMetricsLaunchObserver} that the previous launch sequence has
     * aborted due to intent failure (e.g. intent resolve failed or security error, etc) or
     * intent being delivered to the top running activity.
     */
    private void launchObserverNotifyIntentFailed(long id) {
       Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER,
                "MetricsLogger:launchObserverNotifyIntentFailed");

        mLaunchObserver.onIntentFailed(id);

        Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
    }

    /**
     * Notify the {@link ActivityMetricsLaunchObserver} that the current launch sequence's activity
     * has started.
     */
    private void launchObserverNotifyActivityLaunched(TransitionInfo info) {
        Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER,
                "MetricsLogger:launchObserverNotifyActivityLaunched");

        @ActivityMetricsLaunchObserver.Temperature int temperature =
                convertTransitionTypeToLaunchObserverTemperature(info.mTransitionType);

        // Beginning a launch is timing sensitive and so should be observed as soon as possible.
        mLaunchObserver.onActivityLaunched(info.mLaunchingState.mStartUptimeNs,
                info.mLastLaunchedActivity.mActivityComponent, temperature,
                info.mLastLaunchedActivity.mUserId);

        Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
    }

    /**
     * Notifies the {@link ActivityMetricsLaunchObserver} the reportFullDrawn event.
     */
    private void launchObserverNotifyReportFullyDrawn(TransitionInfo info, long timestampNs) {
        Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER,
            "MetricsLogger:launchObserverNotifyReportFullyDrawn");
        mLaunchObserver.onReportFullyDrawn(info.mLaunchingState.mStartUptimeNs, timestampNs);
        Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
    }

    /**
     * Notify the {@link ActivityMetricsLaunchObserver} that the current launch sequence is
     * cancelled.
     */
    private void launchObserverNotifyActivityLaunchCancelled(TransitionInfo info) {
        Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER,
                "MetricsLogger:launchObserverNotifyActivityLaunchCancelled");

        mLaunchObserver.onActivityLaunchCancelled(info.mLaunchingState.mStartUptimeNs);

        Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
    }

    /**
     * Notify the {@link ActivityMetricsLaunchObserver} that the current launch sequence's activity
     * has fully finished (successfully).
     */
    private void launchObserverNotifyActivityLaunchFinished(TransitionInfo info, long timestampNs) {
        Trace.traceBegin(Trace.TRACE_TAG_ACTIVITY_MANAGER,
                "MetricsLogger:launchObserverNotifyActivityLaunchFinished");

        mLaunchObserver.onActivityLaunchFinished(info.mLaunchingState.mStartUptimeNs,
                info.mLastLaunchedActivity.mActivityComponent, timestampNs,
                info.mLastLaunchedActivity.launchMode);

        Trace.traceEnd(Trace.TRACE_TAG_ACTIVITY_MANAGER);
    }

    private static @ActivityMetricsLaunchObserver.Temperature int
            convertTransitionTypeToLaunchObserverTemperature(int transitionType) {
        switch (transitionType) {
            case TYPE_TRANSITION_WARM_LAUNCH:
                return ActivityMetricsLaunchObserver.TEMPERATURE_WARM;
            case TYPE_TRANSITION_HOT_LAUNCH:
                return ActivityMetricsLaunchObserver.TEMPERATURE_HOT;
            case TYPE_TRANSITION_COLD_LAUNCH:
                return ActivityMetricsLaunchObserver.TEMPERATURE_COLD;
            default:
                return -1;
        }
    }

    private boolean wasStoppedNeedsLogging(TransitionInfoSnapshot info) {
        if (info.processRecord != null) {
            return (info.processRecord.wasForceStopped()
                        || info.processRecord.wasFirstLaunch())
                    && !info.processRecord.getWasStoppedLogged();
        } else {
            return (info.applicationInfo.flags & ApplicationInfo.FLAG_STOPPED) != 0;
        }
    }

    private boolean wasFirstLaunch(TransitionInfoSnapshot info) {
        if (info.processRecord != null) {
            return info.processRecord.wasFirstLaunch()
                    && !info.processRecord.getWasStoppedLogged();
        }
        try {
            return !mSupervisor.mService.getPackageManagerInternalLocked()
                    .wasPackageEverLaunched(info.packageName, info.userId);
        } catch (Exception e) {
            // Couldn't find the state record, so must be a newly installed app
            return true;
        }
    }
}